From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31280C43613 for ; Mon, 24 Jun 2019 14:33:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06485215EA for ; Mon, 24 Jun 2019 14:33:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="lXHRsLKG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729846AbfFXOdw (ORCPT ); Mon, 24 Jun 2019 10:33:52 -0400 Received: from mail-vs1-f74.google.com ([209.85.217.74]:40581 "EHLO mail-vs1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729744AbfFXOds (ORCPT ); Mon, 24 Jun 2019 10:33:48 -0400 Received: by mail-vs1-f74.google.com with SMTP id v9so3938106vsq.7 for ; Mon, 24 Jun 2019 07:33:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=cqAi+OvlHabK4r0DKR/uDYr47zBS8kkFmriW/t8FK6c=; b=lXHRsLKGuntJdIfx4IktI470fGbyq/kS83cL/1CQ6KcaqQfI5cgbGIOLx+on2O/XRl TyhQq0vCGRVG2NDDFcvggYJ0wxa3AKn2CR+yK/03NNoH4bycNdBR8ox3sdPwTeSrQLuo rHeW6O5U9Mg0jIkwq44zjpbQCUdfc3U4ayQ8Dr3awwdf8ADrTM4zsPAD1J2Hva/3oEGx iuAfMdkeDB0VVqrLEmMomvjY9gvAQgEF5ueMNKjNbD3E+c53zhezKvbXOoKR1nLLue5p C6JfI9UG0Qq2Dtp4qvSg2UI+NSz05kgH40lBS5dNGwoMFiWCdzLiE4V8NQ/k/pPRpCug 2y1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=cqAi+OvlHabK4r0DKR/uDYr47zBS8kkFmriW/t8FK6c=; b=X07OgcA5VNDw5Txja/rMgOBvJylob9BL7UmMbFbGGzbTUoIe7Ib9UM1czoBu+Jq6ty da3t1U8TVkY7ylqQFY9b1sXWzJxImKSvKE4OoR2BA6BSJ7VHXgu6h/Oz9Y8q6NOFCMwa pGhsjpSzIvO8JjXX/vwfxvptFwUvkJoJIV4LSWpthVUqJwCm3LIHn+9Cc1DGI+AnZDIg R+CftY6PNEsWg1aaIRXxacwyozubTyQJPsctixR6eE/tXdSdKhoITLg7D8cSxSyZGiKp nsEJbZ6NixvgktCAVMll48KThKZiUUUBI+9+kOoXVi7V16+egpubS9/7Z/I2ewhcS2Y5 8Hdg== X-Gm-Message-State: APjAAAWTdaWh5tzklB2AgZueKxzd14EzV6d+OFhJgVoEeOLuaQTs0wdu w5I5/e9U6WcBLdEIADWNDrq0MjSepB3F4RJk X-Google-Smtp-Source: APXvYqzY+u8RznlTrOWrBgn25HhvDfTMe7SZyf9e34JUgJZBNd08PatZvu4lGf3zfqdvX7DoXuI91wYnbBpoYfQ0 X-Received: by 2002:ab0:7848:: with SMTP id y8mr60797129uaq.58.1561386827462; Mon, 24 Jun 2019 07:33:47 -0700 (PDT) Date: Mon, 24 Jun 2019 16:32:58 +0200 In-Reply-To: Message-Id: <280ca5496fe82873caac306ca76fb40d702979ff.1561386715.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v18 13/15] tee/shm: untag user pointers in tee_shm_register From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is a part of a series that extends kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tee_shm_register()->optee_shm_unregister()->check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Reviewed-by: Kees Cook Acked-by: Jens Wiklander Signed-off-by: Andrey Konovalov --- drivers/tee/tee_shm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 2da026fd12c9..09ddcd06c715 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -254,6 +254,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, shm->teedev = teedev; shm->ctx = ctx; shm->id = -1; + addr = untagged_addr(addr); start = rounddown(addr, PAGE_SIZE); shm->offset = addr - start; shm->size = length; -- 2.22.0.410.gd8fdbe21b5-goog